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en:instr [2016/01/01 22:41]
127.0.0.1 external edit 		en:instr [2020/02/28 10:46] (current)
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 ===== Instr (Function) ===== ===== Instr (Function) =====
 ==== Format ==== ==== Format ====
-**instr** ( //haystack_expr// , //needle_expr// )\\ +**instr** ( [[stringexpressions|haystack_string_expression]] , [[stringexpressions|needle_string_expression]] )\\ 
-**instr** ( //haystack_expr// , //needle_expr// , //start_expr// )\\ +**instr** ( [[stringexpressions|haystack_string_expression]] , [[stringexpressions|needle_string_expression]] , [[integerexpressions|start_expression]] )\\ 
-**instr** ( //haystack_expr// , //needle_expr// , //start_expr// , //boolean_expr//)\\+**instr** ( [[stringexpressions|haystack_string_expression]] , [[stringexpressions|needle_string_expression]] , [[integerexpressions|start_expression]] , [[booleanexpressions|boolean_expression]])\\
  
-returns //positive_integer_value//+returns [[integerexpressions|integer_expression]]
  
 ==== Description ==== ==== Description ====
-Check to see if the string //needle_expr// is contained in the string //haystack_expr//.  If it is, then this function will return the index of starting character of the first place where //needle_expr// occurs.  Otherwise, this function will return 0.  You may also specify an optional starting location for the search to begin //start_expr// and a //boolean_expr// to specify that the search will treat upper and lower case letters the same.+Check to see if the string [[stringexpressions|needle_string_expression]] is contained in the string [[stringexpressions|haystack_string_expression]].  If it is, then this function will return the index of starting character of the first place where [[stringexpressions|needle_string_expression]] occurs.  Otherwise, this function will return 0. 
 + 
 +You may optionally specify a starting location for the search to begin [[integerexpressions|start_expression]].  If the start is 1 or greater the search will begin from the specified character from the start.  If the start is < 0 then the search will begin from the nth character from the end.  The search will ALWAYS look forward. 
 + 
 +An optional [[booleanexpressions|boolean_expression]] may be used to specify that the search will treat upper and lower case letters the same. 
 ==== Note ==== ==== Note ====
 String indices begin at 1. String indices begin at 1.
 +
 ==== Example ==== ==== Example ====
 <code> <code>
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 ==== History ====  ==== History ==== 
 |0.9.6.55|New to Version| |0.9.6.55|New to Version|
 +|1.99.99.53|Added start position < 0|
 +
  
en/instr.1451713282.txt.gz · Last modified: 2020/02/28 10:46 (external edit)

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